Improvement in boiler-flue cleaners



Y scraper-,which is composed of a bent plate having straight filtrati .w@time MM-.cfa mi@ MONROE MORSE AND CHARLES H. MORSE,

CHUS

OF FRANKLIN, MASSA- ETTS.

Letters Patent No. 88,405, elated .March 30, 1869.

To all whom it may concern:

Be it known that we, MONROE MORSE and CHARLES H. MORsE,of Franklin, inthe county of Norfolk, and State of Massachusetts, have invented a newand improved Boiler-Scraper; and we do hereby declare that the followingis a full, clear, and exact description thereof, which will enableothers skilled in the art to make and use the same,refereuce being hadto the accom pauying drawings, forming part of this specification, inwhich- Figure 1 represents a front view of our improved boiler-scraper.Figure 2 is a side view of the saine.

Similar letters of reference indicate corres parts.

This invention relates to a new self-adjusting boilerponding sides, sothat all its edges will form cutting-edges within the tube to becleaned; thereby quicker operation is obtained with simpler .apparatusthan with the devices heretofore used.

A, in the drawing, represents the handle of our improved scraper. p

The same is provided with shoulders (t and b, to which a bar, B, isfastened, said bar supporting the scraping-plate C, which is fastened toit by means of rivets c c, or their equivalents. l The scraper-plate Ois represented as a qnadraugular plate, bent spirally, so that twopoints are in line with the bar B, while the other two are opposite thesaule, as shown. All the edges ofthe plate C, which are cutting-edges ofthe scraper, are thus broughtinto an oblique direction, so as to be mosteffective during so as to produce additional cutting-edges, which serveto hasten the @leerling-process. The plate being only fastened in themiddle, and having its ends free to yield, will always adjust itselfthroughout its whole length to any size of tube.

The elastic Scrapers heretofore used were so arranged that their middleportions could be expanded or contracted while their ends were entirelyinoperative.

By our invention, the whole length of the instrument is utilized,whatever may be the size of tube in which it is to he used. By bendinganarrow steel plate into a coil, which has straight sides, so as to helike a cylinder with spiral slots, the same result will be obtained. Thecutting-edges may be made -to project from the. outer face of the plate,so as to reduce the friction, by having those parts which do notactually clean the tube, out ofcontact with the same. The plate C may bemade of several pieces, if desired.

Having thus described our invention,

XVe claim as new, aud desire to secure by Letters Patentl. The elasticperforated boiler-scraper plate C,which is bent into a cylindrical form,so that its edges are spiral, as set forth, to form cutting-edges of thescraper, substantially as specified.

2. The construction of the cylindrical or spiral boilerscraper O, withthe perforation d, whereby to obtain additional cutting-edges, as setforth.

MONROE MORSE. CHARLES H. MORSE. Witnesses:

HENRY E. POND, THADDEUs M. TURNER.

operation. The plate may even be perforated, as shown,

